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2 086 670

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C1

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Application

96110861/02, 1996-06-10

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Actual filing date

1996-06-10

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Published

1997-08-10

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Inventor

Galichenko E.N.Medvedev A.P.Tetjueva T.V.Laptev V.A.Degaj A.S.Grigor'Ev A.G.Davydov V.Ja.Men'Shchikova R.N.Gubin Ju.G.Katjushkin V.G.

(73)

Holder

Aktsionernoe Obshchestvo Trubnyj Zavod"Predprijatie

METHOD OF HEAT TREATMENT OF PIPES Russian patent published in 1997 - IPC

Abstract RU 2086670 C1

FIELD: ferrous metallurgy. SUBSTANCE: invention relates to manufacturing oil and gas duct pipes from low-carbon steel resistant to corrosion cracking in hydrogen sulfide-containing media. Pipes at temperature of the end of rolling are cooled in air, heated to 1080-1120 C, cooled in water, reheated to 880-920 C, cooled in water once again, and finally heated to 740- 760 C and cooled in water. Drawback is effected at 680-700 C followed by cooling in air. EFFECT: increased corrosion immunity. 1 tbl

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RU 2 086 670 C1

Authors

Galichenko E.N.

Medvedev A.P.

Tetjueva T.V.

Laptev V.A.

Degaj A.S.

Grigor'Ev A.G.

Davydov V.Ja.

Men'Shchikova R.N.

Gubin Ju.G.

Katjushkin V.G.

Dates

1997-08-10—Published

1996-06-10—Filed

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